Develop Bugs

Random power drain

Yesterday as I started my day, i pulled my GN from its charger (99%) and made my journey to uni. The trip takes about 50 mins. For the past month now Ive been using poweramp and have had no problems. But when i got to class i realised i had like 25% power during my trip and the back of the GN was a bit warm. I closed all programs and the power drain stopped. I was a bit concerned so a few hours later when i tried playing music again on poweramp but nothing drained the power. So maybe it was a freak occurrence?
So I went to bed last night and the phone was fine. something around 80% power. I woke up 5 hours into my sleep to check on my phone (its a bad habit) and went back to sleep for another 2-3 hours. When i woke up i found my phone had discharged a whole lot of power again randomly in that space of a few hours.
So what the hell happened in that time?! All I did was turn the screen on and turned it off. My usage patterns have not changed.
here is an screen shot of my power usage. You can see the first drop of power, thats nothing of concern as i was playing angry birds space before bed. Then you see the straight line as the phone was idle while i was sleeping. The next drop is when I woke up to check my phone and that's when the discharging happens again. Then you see it recovering when i woke up and closed all the background apps in hope that it would stop the power drain..which it did.
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
Anyone have some ideas as to what is causing this?
Also keep in mind that before the first instance of power drain my phone configuration had not changed a single bit besides a light flow lite update the night before.
edit: oh FYI, running stock 4.0.2 on yakju

Any apps that you updated or installed yesterday? New rom? Did you make any changes to your phone at all since yesterday?
Sent from my Galaxy Nexus

Mitchmoney said:
Any apps that you updated or installed yesterday? New rom? Did you make any changes to your phone at all since yesterday?
Sent from my Galaxy Nexus
Click to expand...
Click to collapse
No new apps, but some app updates. I know at least light flow was updated.
this random power discharge is really getting annoying. It happened again today.
A new symptom seems that the video doesnt load on the phone. for example, trying to load youtube or recorded videos saved on my phone.
Originally i thought my 3g was playing up but when it wouldnt load a video i recorded that was a bit unusual. in fact the gallery app froze and crashed.

Did you search the forum and install CPU Spy and Better Battery stats?
Get some data and find out what is causing wakelocks. Your phone has a lot of "wake" time.
See with CPU spy how much it is spending in Deep sleep and with Better Battery stats look what is preventing it from going into that state. If it's an app: simply remove it.

How's your signal service been lately? I get pretty stank reception at work so my gnex gets pretty warm at the top and battery life suffers. I just put it on airplane mode and reset the radio to force it to chill out for awhile

Diger36 said:
Did you search the forum and install CPU Spy and Better Battery stats?
Get some data and find out what is causing wakelocks. Your phone has a lot of "wake" time.
See with CPU spy how much it is spending in Deep sleep and with Better Battery stats look what is preventing it from going into that state. If it's an app: simply remove it.
Click to expand...
Click to collapse
Thanks ill try that. Just installed CPU spy. Is there an alternative to better battery stats? Don't really want to fork out something to debug this.
I originally used OS monitor, and i checked what was running while the abnormal discharge was happening but nothing showed up.
You make a good point about the amount of wake time though. That long stretch where i was sleeping, my phone shouldnt be waking up that much should it? It didnt seem to affect battery life that much.

pdiggitydogg said:
How's your signal service been lately? I get pretty stank reception at work so my gnex gets pretty warm at the top and battery life suffers. I just put it on airplane mode and reset the radio to force it to chill out for awhile
Click to expand...
Click to collapse
Reception has been normal (since I'm around the CBD a lot)

csirac said:
Thanks ill try that. Just installed CPU spy. Is there an alternative to better battery stats? Don't really want to fork out something to debug this.
I originally used OS monitor, and i checked what was running while the abnormal discharge was happening but nothing showed up.
You make a good point about the amount of wake time though. That long stretch where i was sleeping, my phone shouldnt be waking up that much should it? It didnt seem to affect battery life that much.
Click to expand...
Click to collapse
Better Battery Stats is the one I use and is recommended here a lot. It gives you insight in the wakelocks from the kernel, as well as from apps. Don't know about the alternatives. It's definately about the wakelocks. Your phone should be in Deep Sleep for 90% or so when you don't touch it (depending on your sync frequency off course).

Diger36 said:
Better Battery Stats is the one I use and is recommended here a lot. It gives you insight in the wakelocks from the kernel, as well as from apps. Don't know about the alternatives. It's definately about the wakelocks. Your phone should be in Deep Sleep for 90% or so when you don't touch it (depending on your sync frequency off course).
Click to expand...
Click to collapse
The only account that is sync'ed is my gmail. The other two listed (twitter and dropbox) is turned off. Are there other options to turn the freq of when the phone syncs?
It's so strange because before these problems came about I had good battery life. ie: 3+hours of screen time.

csirac said:
The only account that is sync'ed is my gmail. The other two listed (twitter and dropbox) is turned off. Are there other options to turn the freq of when the phone syncs?
It's so strange because before these problems came about I had good battery life. ie: 3+hours of screen time.
Click to expand...
Click to collapse
You usually set it at System Settings, accounts & Synchronisation but some apps allow you to set it within the app... There are apps that allow you to make profiles so that, for instance at night, your device turns off all data. I used to use Juicedefender but that was IMHO more a placebo effect then a real improvement.
I definately think you should install the mentioned apps and after such drain re-appeared analyse what happened.

So after a little bit of troubleshooting I narrowed the problem down to Light Flow Lite.
Last night I went to bed with 100% charge. It discharged normally throughout the night until 4 hours in when I received an email. I woke up about an hour later and saw this so i suspected it was light flow. I cleared the notification and went back to sleep. I woke up about 30 mins later and was sad to see that my fears were confirmed. Battery discharge had settled down and was acting as normal. Just to be 100% sure though, i sent an email to myself to set off a notification and left it for another 30 mins, and as you can guess, the battery started draining excessively again.
Here is the screenshot. First part obviously is when im sleeping. then that dip is the email coming in. That TINY TINY dip upwards is another email coming in a min after I cleared the original email. So the battery drain continues until i wake up and clear it again. This time no more notifications came through and the battery drain settles down.
Again keep in mind that I have used Light Flow Light for 2 months now without problems.
Anyone else experience problems with Light flow or Light Flow light since it was updated on the 20th March?

I have been great with my light flow lite..I had a problem with my own battery when I updated Google chrome.. uninstalling that fixed my problem..
Sent from my Galaxy Nexus

gps-lock draining battery

My phone's battery is draining really fast with minimal usage. Take a look at these battery usage screenshots:
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
As you can see, the battery is pretty close to dying out after 11 hours with just 30 minutes of screen time. This definitely isn't right so I decided to look around. I haven't installed any suspicious apps and Android's battery usage stats are pretty unhelpful, but Better Battery Stats reveals the culprit: a gps-lock kernel wakelock.
While this wakelock is active, I've noticed that GPS apps don't work. None of the GPS apps show any GPS icon in the status bar and I don't seem to get any lock. The apps just fall back to the network location.
Turning the GPS or location services altogether off and on doesn't seem to help. Keeping the GPS off completely doesn't help either. A reboot does remove this wakelock... for a short while. Then it just pops up back again after a short while and doesn't clear unless I reboot.
I'm not sure where else I can look for the source and I could use some help.
I'm running stock 4.1.2 on a GSM Nexus.

Bogdan-xd said:
My phone's battery is draining really fast with minimal usage. Take a look at these battery usage screenshots:
As you can see, the battery is pretty close to dying out after 11 hours with just 30 minutes of screen time. This definitely isn't right so I decided to look around. I haven't installed any suspicious apps and Android's battery usage stats are pretty unhelpful, but Better Battery Stats reveals the culprit: a gps-lock kernel wakelock.
While this wakelock is active, I've noticed that GPS apps don't work. None of the GPS apps show any GPS icon in the status bar and I don't seem to get any lock. The apps just fall back to the network location.
Turning the GPS or location services altogether off and on doesn't seem to help. Keeping the GPS off completely doesn't help either. A reboot does remove this wakelock... for a short while. Then it just pops up back again after a short while and doesn't clear unless I reboot.
I'm not sure where else I can look for the source and I could use some help.
I'm running stock 4.1.2 on a GSM Nexus.
Click to expand...
Click to collapse
Google Maps/Google Now any app that use gps is active and searching for your location.
Go the app info clear cache/data and force stop them.
Google Map is pretty the biggest drain.
post your partial wakelock as well that can help us determine what app are awake =)

Simply go to maps setting and remove check-in and other useless option
This gps-lock is caused from google now and maps that continue research for your position, but it's strange and abnormal, i've googlenow actived with all option, and i do 4 hours screen on with always 3g up

r29 said:
Google Maps/Google Now any app that use gps is active and searching for your location.
Go the app info clear cache/data and force stop them.
Google Map is pretty the biggest drain.
post your partial wakelock as well that can help us determine what app are awake =)
Click to expand...
Click to collapse
I didn't take a screenshot of the partial wakelocks since there was nothing suspicious going on in there, but I can get one tomorrow if my battery drains again.
The biggest partial wakelocks usually come from AudioOut (if I listen to music), exchange sync, google backup, g+ sync and the like. Pretty much the same as on my Nexus 7, which doesn't have this crippling kernel wakelock.
Teezekel said:
Simply go to maps setting and remove check-in and other useless option
This gps-lock is caused from google now and maps that continue research for your position, but it's strange and abnormal, i've googlenow actived with all option, and i do 4 hours screen on with always 3g up
Click to expand...
Click to collapse
Thanks. Suprisingly, I had location reporting turned on in Maps, though I don't remember ever turning it on.
Hope it helps, since before this started happening, I could get around 2 days of standby time with around 4 hours of screen time on a single charge.
Other than that, I don't think Google Now and the GPS lock that Maps tries to take every now and then are the culprits. I remember Maps trying to get random GPS fixes on my old Gingerbread phone with no significant effect on battery.

Had the same problem - thanks!!
I just wanted to say thank you to all of you - I had pretty much the same problem, and I think following this advice will take care of it for me. It was obvious from the screen captures that "something" was wrong, and searching through the log files for what had the largest percentage solved it for me (I think).

Solution
Simply install TopNTP from google play
and then install his gps options (choose what you prefer)
Problem for me gone after this, and also gps working faster
sry for necro-posting

Massive drain battery

Hi,
I have huge problem which hasn't occurred for the first time. I left my t520 with 92% and fell asleep. When I woke up it was at 40%. I had wifi off, and turned off wifi scanning when eve n off (which caused drain esrlier). According to wake lock detector the process which keeps running can be seen under. Please help me. In settings it only says that android process (97% usage of battery) has used CPU for 10h42mi and stood awake for 7h45min
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
http://imgur.com/wNEhSFt
P.s. This tab is complete rubbish....

i would suggest go into settings....->battery. this should show u what is using your battery the most. if its a app delete it and see if it works. if not i would recomend doing a factory reset. this is what i do when something eats my battery alot.
foxracer89 said:
Hi,
I have huge problem which hasn't occurred for the first time. I left my t520 with 92% and fell asleep. When I woke up it was at 40%. I had wifi off, and turned off wifi scanning when eve n off (which caused drain esrlier). According to wake lock detector the process which keeps running can be seen under. Please help me. In settings it only says that android process (97% usage of battery) has used CPU for 10h42mi and stood awake for 7h45min
http://imgur.com/wNEhSFt
P.s. This tab is complete rubbish....
Click to expand...
Click to collapse

foxracer89 said:
Hi,
I have huge problem which hasn't occurred for the first time. I left my t520 with 92% and fell asleep. When I woke up it was at 40%. I had wifi off, and turned off wifi scanning when eve n off (which caused drain esrlier). According to wake lock detector the process which keeps running can be seen under. Please help me. In settings it only says that android process (97% usage of battery) has used CPU for 10h42mi and stood awake for 7h45min
http://imgur.com/wNEhSFt
P.s. This tab is complete rubbish....
Click to expand...
Click to collapse
Are you using Songza? It has big problems right now with battery drain. The deal is, is probably not the device. There is an app that is causing your issue.
Sent from my SM-T320 using XDA Premium 4 mobile app

The tab yesterday got from 30% to complete 0% with everything off (aeroplane mode, sync off etc.) just laying on the desk.
In settings its shows that battery is drained only by Android process.
I was thinking about what might be the cause and just realised that it started to happen just affter purchase of original samsung case for this tab. Is it possible that it had impact on one of the processes? Cause CPU is active almost all the time despite neither app running in the background... Maybe it's due to the magnetic thingy which wakes the screen?

foxracer89 said:
I was thinking about what might be the cause and just realised that it started to happen just affter purchase of original samsung case for this tab. Is it possible that it had impact on one of the processes? Cause CPU is active almost all the time despite neither app running in the background... Maybe it's due to the magnetic thingy which wakes the screen?
Click to expand...
Click to collapse
If the magnet is turning the tablet on, the screen would be on, and you can see that even with the cover of the case closed. So if you can see the screen if off, then I would say no, the magnet is not causing your drain problem.
Do you have Skype installed? This is a known battery drain problem on Kitkat as well. Its a bug within Kitkat itself, so maybe that is why its being reported as the Android process, and not one of your apps.

take a screenshot of you battery

redpoint73 said:
If the magnet is turning the tablet on, the screen would be on, and you can see that even with the cover of the case closed. So if you can see the screen if off, then I would say no, the magnet is not causing your drain problem.
Do you have Skype installed? This is a known battery drain problem on Kitkat as well. Its a bug within Kitkat itself, so maybe that is why its being reported as the Android process, and not one of your apps.
Click to expand...
Click to collapse
I don't think it's an app problem. I have only few apps installed (news reader, 2 games, fb and few random apps. I'll upload the screenshot when I'll be at home

Yep, my battery has started playing up. It likes to say it's 21% but then goes to 15, then between 2 and 4 within a couple of minutes. Sometimes runs on 1% for ages. But then dies, I turn it back on and it says 21%
Don't know if is root related. Our if I just need a hard reset. Going to try draining battery fully, then charging to full with device off
Sent from my SM-T520 using XDA Premium HD app

I also have never seen such a huge battery drain on any samsung or android device. For once, if you dont need it, go into settings and location services. Just disable it completly with that switch. This reduces the drain a lot, but is still way to high...
For me, it drains about 20% overnight with location on (completly offline) and about 10% without location services.

I have the same problem as well. It will continuously drain from 90-50 in minutes and then 50-15 and so on. 1% sometimes lasts for 30 minutes+ and when I restart it will be 15+% again. I thought it might be because of custom roms so I reset it back to stock many times and same problem. The only apps I have installed are adobe reader and es file manager.

JAIMEREYES said:
I have the same problem as well. It will continuously drain from 90-50 in minutes and then 50-15 and so on. 1% sometimes lasts for 30 minutes+ and when I restart it will be 15+% again. I thought it might be because of custom roms so I reset it back to stock many times and same problem. The only apps I have installed are adobe reader and es file manager.
Click to expand...
Click to collapse
boy, you're digging out a two year old thread!!
if you have such a battery drain you have different (unsatisfying) choices:
1. try battery calibration or other roms
2. throw you tab away + buy a new one
3. buy a new battery
4. accept it (like me)
5. wait until someone brings an awesome new rom which will give an awesome battery life
(sorry for hidden sarcasm but this tablet is just a big disappointment (for me))

I don't think you should throw away devices or buy new batteries without first analyzing what the problem could be. If you are rooted, download an app such as Wakelock Detector and BetterBatteryStats first, make sure there isn't some rogue app or process that is constantly running in the background. Also, if you are running the 8.4 (or perhaps it also works with the 10.1 / 12.1), check out the link in my signature on how to reseat your battery. Many people have found success with all kinds of battery problems.

Sudden battery drain - how to tell what caused it?

My Zenwatch usually consumes <50% of its battery during a typical day. Today however it was completely dead by 7pm, even though there was nothing unusual about the day - it was worn at the same location all day, and was in close proximity to my phone all day.
Is there any way of tracing what causes this sort of sudden battery drain?

Hello,
same Problem here.
You can use the "Android Wear" app, connect to your watch and press the gear wheel on the upper right, then press on the first entry " Asus Zenwatch 2" and then you see the option "Battery of the watch" in the middled of the screen. It looks the same as you can see it on the telephone but for you watch battery.
I made a few screenshots today:
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
looks ok for me...
still ok...
now there has something started sucking the battery empty....
now it has stopped... but only for a moment - later it came back and at 15:30 I had only 13% left. I noticed that the temperature display still was showing 7°C but my car display shows 16".
I restarted the watch now and voilá the temp changed to 16°... very stange
And this is the second watch - the first one I send back to Amazon because of the same "bug" ....

For some reason I can't see any of your screenshots. Any chance or re-uploading them?

itm said:
For some reason I can't see any of your screenshots. Any chance or re-uploading them?
Click to expand...
Click to collapse
better now?

Still nothing
???

I think he was trying to upload a screenshot like the one I attached to this post, it's basically a similar battery usage indicator like the one for the Android phone itself. I don't have anything on here really, yet, because it hasn't been too long since I took it off the charger.

Asus Zentalk forum has walkthroughs
The Asus ZenTalk forum has a walk-through with pictures on how to get to the battery use screen. (I'd post the link for you, but I don't have enough posts yet to post links).

I just had the same problem happen this evening. Everything was fine until about 8pm, with 70% remaining, then two hours later it had plummeted to 15%. I checked the battery stats in the Android Wear app, as suggested, but they didn't help: there were only 2 lines:
- Watch Idle: 5%
- Screen: 2%
Screenshot is here:
https://www.dropbox.com/s/jd8x74gbhs78uih/Screenshot_2015-10-29-21-47-19.png?dl=0
???

itm said:
I just had the same problem happen this evening. Everything was fine until about 8pm, with 70% remaining, then two hours later it had plummeted to 15%. I checked the battery stats in the Android Wear app, as suggested, but they didn't help: there were only 2 lines:
- Watch Idle: 5%
- Screen: 2%
???
Click to expand...
Click to collapse
That is a pretty drastic and sudden drop. What watch face were you using? Did the watch do (vibrate?) or alert you to anything (view messages, receive a call, etc) during that time?
What are each of your settings in the settings area (what features do you have turned on or off)? If you have wifi turned on where you in an area where it may have been attempting to connect to nearby wifi networks and repeatedly failing (like trying to connect to networks where there are sign-on pages where you have to agree to a user agreement before connecting to a free wifi network)?
If you look at your phone battery usage during that same time (if you still can) does it show anything highly active on your phone during that time? (For example could the phone have been trying to update any of the files or apps on your watch during that time?).

To answer your questions:
- What watch face were you using? Perfection (although the last time I had this problem I was using the Explorer watchface)
- Did the watch do (vibrate?) or alert you to anything (view messages, receive a call, etc) during that time? No - I just got a few notifications when emails came in
- What are each of your settings in the settings area?
- Brightness: 3
- Font size: Normal
- Always on screen: Off
- Wrist gestures: On
- Screen lock: Off
- If you have wifi turned on where you in an area where it may have been attempting to connect to nearby wifi networks and repeatedly failing - No, I was at
home in my study and lounge (within 15 feet of my wifi router at all times)
- If you look at your phone battery usage during that same time (if you still can) does it show anything highly active on your phone during that time? I don't have the ability to look at yesterday's phone battery stats, but I know that there were no app updates or unusual notifications on the phone during that period yesterday
???

itm said:
To answer your questions:
- What watch face were you using? Perfection (although the last time I had this problem I was using the Explorer watchface)
- Did the watch do (vibrate?) or alert you to anything (view messages, receive a call, etc) during that time? No - I just got a few notifications when emails came in
- What are each of your settings in the settings area?
- Brightness: 3
- Font size: Normal
- Always on screen: Off
- Wrist gestures: On
- Screen lock: Off
- If you have wifi turned on where you in an area where it may have been attempting to connect to nearby wifi networks and repeatedly failing - No, I was at
home in my study and lounge (within 15 feet of my wifi router at all times)
Click to expand...
Click to collapse
In the days that have followed did the problem of sudden drain continue to occur, or does it appear to have been an isolated incident?
In that time period it experienced the drastic drop were you doing anything repeatedly? (ex: eating food, exercising, reading a book?) Repetitive tasks where you wrist was moving a lot may have been turning on your watch using the wrist gestures, and it seems that wrist gestures (where the brightness level 3, color, etc are activated) may use more battery than always on in its timed-out dim mode does. If you're continuing to experience the problem try going a day with always on screen turned on, wrist gestures turned off, and see if there is a difference in your battery use at the end of the day.
Your watch may also be preforming syncing with your phone at a particular time, and transfer of data across wifi between the two may be draining the battery. You could try turning off the sync setting on your phone for a day, and see if that makes a difference.
Finally you can try turning off wifi, and see how much longer your battery lasts with wifi switched off on the watch.

In the period when it dropped drastically I was sitting on the sofa watching TV. There were no repetitive tasks. In fact I could probably not have been less mobile!
I now have "always on" mode enabled, and have disabled tilt-to-wake. So far it has maintained the usual (low) battery usage, so I'll wait and see if I get a recurrence of the problem.
The problem with turning off sync for a day is that it's unlikely to prove anything. This problem only happens every few weeks, so if it doesn't happen on the day that I have sync turned off then I'll be no wiser.
I'm not sure what you mean by turning off wifi on the watch - do you mean putting it into airplane mode? If I do I would fully expect my battery life to improve, but how would that prove whether it was the potential cause of the rapid 2-hour drain?
I'm watching my watch battery levels very closely at the moment, but if I do notice a sudden drain again what can I do to establish exactly what is happening on the watch at the time? If the watchface is displayed as usual, and there's no evidence of any specific app running on the watch, what other options do I have for finding the cause of the excess battery drain?

After 4 weeks I've just had the same problem on 2 consecutive days. At the end of the first day I notiiced that the "tilt-to-wake" option had become re-enabled (I'm not sure how, as I don't remember enabling it). I disabled it again last night, but today my battery was pretty much dead by 9pm. I tried a reboot earlier in the day, but it didn't seem to help.
The latest version of the Android Wear app seems to have removed all info on battery usage, so this is impossible to diagnose. As things stand, the watch has gone from being an all-day device to a device that won't last a whole day in the last days (

Rather than trouble shooting you should just go for a completely new set up of the watch. Uninstall the wear and ZenWatch manager apps, factory reset the watch and reinstall everything.
I've gone from just under a day to an insane 3-4 days battery life. (I don't use any fitness trackers or ambient mode btw)
Sent from my ASUS_Z00AD using Tapatalk

So today the problem seems to have gone away. For the first time since the weekend I got through the whole day with only 40% battery usage. This battery drain issue seems completely random, and it's annoying that there's no way of diagnosing it.
Surprised that more people aren't seeing this.

itm said:
The latest version of the Android Wear app seems to have removed all info on battery usage
Click to expand...
Click to collapse
The new version of Wear from yesterday has the battery usage option again.

CSX321 said:
The new version of Wear from yesterday has the battery usage option again.
Click to expand...
Click to collapse
Hmmm....I'm not seeing an update with that option in it yet.....maybe tomorrow...

itm said:
Hmmm....I'm not seeing an update with that option in it yet.....maybe tomorrow...
Click to expand...
Click to collapse
For reference, the version I got yesterday (as shown on the phone) is 1.4.0.2470307.gms

CSX321 said:
The new version of Wear from yesterday has the battery usage option again.
Click to expand...
Click to collapse
CSX321 said:
For reference, the version I got yesterday (as shown on the phone) is 1.4.0.2470307.gms
Click to expand...
Click to collapse
Ah OK I'm still on 1.4.0.2462440.gms and the Play Store isn't showing an update available yet. Fingers crossed I'll get it soon, and that the battery info actually gives me some useful information when I see it draining fast next time.

[MM] Got Poor Battery Life? No Deep Sleep - Possible reasons, and possible fix inside

Like a lot of people I found myself with battery woes on the G4, at first my battery was comparable to my G3, if not a little bit better but over time, and certainly since MM was released, my battery life was quite frankly awful.
Long Story
I was losing power rapidly, even when I was barely touching the phone - so I finally decided to look into it. After carefully monitoring apps, wakelocks etc nothing looked out of place, everything was working normally until I installed my old faithful app - SetCPU, this is a nice basic app that just shows what your CPU has clocked too and how long it spent there in a given timescale and one thing alarmed me greatly. I was getting less than one minute of deep sleep in every 60 minutes the phone was running - now if I had been using the phone for 58 minutes of that hour I would expect this, only I hadn't!
I did more testing, and more testing and more testing but the results were the same, the phone barely entered deep sleep, and when it did it didn't stay there very long.
Now as I said, using all the other apps, and android stats, nothing looked particularly out of place and after a few days of trying everything under the sun to fix the problem I decided to go nuclear. I wiped the phone, installed no third party apps but setcpu and began testing. I left the phone for a period of 10 minutes to see what the deep sleep value was (looking for it to be somewhere between 80 and 100% of time, which it was!) and it seemed to be back to normal, working fine. So then I started to install my core apps, one by one running the same 10 minute test between each one, idea being eventually I would hit whatever app it was that caused me problems.
So I installed upwards of 30 apps, and everything was still fine, in 10 minutes of not using my phone I was getting around 9 minutes of deep sleep, which is what you would expect.
And then came facebook, now I know there are lots of reports of facebook being a bad app blah blah blah, but I have never seen facebook react like this before, and I don't know if it was marshmallow or a mixture of marshmallow and LG - but when facebook is installed my phone stopped sleeping again, at first it wasn't a huge change, but was noticeable it dropped to deep sleeping at about the 40% mark so I had 4 minutes deep sleep in my 10 minute test - force closing facebook made no difference, I tested it again and again, rebooted and again - same results.
I then installed facebook messenger, and my deep sleep dropped again, to about 20%.
I then uninstalled messenger - no change.
I then rebooted - back to 40%
I then removed facebook - no change
I then rebooted - back to 80+ %.
TLDR: The "Solution"
Now for some of you this won't be a solution as you will claim you need the apps, but there are third party alternatives out there that work pretty well without causing this issue.
Facebook (and facebook messenger) on stock MM builds (at least on the G4) causes the phone to hardly ever enter "deep sleep", this means it is always running a CPU clock, albeit the lowest setting, but it consumes far more power than it needs too especially when the phone is not in use.
After removing them my phone is now sleeping fine and my battery life is back to being very good - lost 4% in the last 8 hours (albeit idle, I was asleep), which is much better than losing 4% an hour that I was before facebook was removed.
Go give it a try, install setcpu, reset the timer close go back to your home screen then leave your phone for 10 minutes then check your deep sleep values, then try it after removing facebook (and rebooting).
Let me know how you get on.

Hold your horses!
You should try Amplify:
https://play.google.com/store/apps/details?id=com.ryansteckler.nlpunbounce&hl=en_GB
http://forum.xda-developers.com/xposed/modules/mod-nlpunbounce-reduce-nlp-wakelocks-t2853874
I have used it to disable Facebook services and limit the wakelocks and alarms to every 3600 seconds. Last night I had 5hrs of deep sleep with no interruption whatsoever.

dtective said:
Hold your horses!
You should try Amplify:
https://play.google.com/store/apps/details?id=com.ryansteckler.nlpunbounce&hl=en_GB
http://forum.xda-developers.com/xposed/modules/mod-nlpunbounce-reduce-nlp-wakelocks-t2853874
I have used it to disable Facebook services and limit the wakelocks and alarms to every 3600 seconds. Last night I had 5hrs of deep sleep with no interruption whatsoever.
Click to expand...
Click to collapse
only any use if you have root

So interesting...
Can you do those tests again after disabling the Marshmallow battery optimizing for Facebook app ?
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I was having these issues too after upgrading to MM. My battery life was appalling and Facebook was keeping the phone awake for hours at a time. I simply did a full factory reset, and then restored my phone from the most recent backup. My battery life is now excellent, even with Facebook and Messenger installed

There was a wakelock introduced with the new version of facebook about a week ago not sure if it is still relevant. It goes by the name of bugreporting service. Something like that. The same goes with FB messenger. I got pissed off with the official app because of this and got Metal instead

I don't run Facebook (never have) or any messaging other than Hangouts and battery is always great (2-3 days). If you don't need it...uninstall it.
Kindle app was always a great one for running constantly in the background for no reason. So I bought an actual Kindle and didn't use the app.

I totally agree with the OP, I started having the exact issues after I updated to the latest facebook and messenger apps and my phone was entering deep sleep at all. I removed them last night and its much much better now.

My girlfriend's g3 with mm gets this message lots of time
{
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"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
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Until a few weeks ago, the Facebook app had a setting where you could choose the sync frequency and I was able to set mine to every 4 hours.
This setting appears to have disappeared now. Could this be the problem?

Nope. It's not the solution. I uninstalled Facebook but am barely getting 2+ hours of screen-on time on v20b.
A Redditor mentioned that some process called 'logd' is eating up resources and killing battery life. I used Terminal Emulator to verify it.
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logd is a separate issue that no one has quite worked out what is causing it - it is to do with error reporting, either from LG or Google apps.

That redditor here. Logd isn't actually logging anything when its CPU usage hits 16% (the problem). You can verify by running logcat in adb shell while watching cpu usage in terminal emulator on phone.
I removed logd by renaming the binary, it's over doubled by SOT from 1-2h to 4+h. As this is my first post on xda I can't link the thread I made on reddit about it -- but you'll find it on /r/lgg4 on the first page ("PSA: How to fix 6.0 / marshmallow logd battery drain (TWRP/root)")